(loosely) A contradiction in terms. Historically, an oxymoron was a paradox with a point, where the contradiction seems absurd at first glance, and yet is deliberate, its purpose being to underscore a point or to draw attention to a concealed point.
By far the most massive planet in our solar system, Jupiter features giant hurricanes, auroras, abstract artistic cloudswirls, and maybe even a solid core. It also protects Earth by gravitationally clearing the solar system of asteroids and comets.
Jupiter is the solar system's largest planet. It's a gas giant that's 272,945.9 miles round at the equator. Its atmosphere is made mostly of helium and hydrogen, though scientists believe there is an Earth-sized solid core at its center.